nova_placement_api_query.sh

#!/bin/bash -eu
#
# Origin: https://gist.github.com/dosaboy/e7b5d142fd56540b6600dc428edf5656
#
# Authors:
#  - edward.hope-morley@canonical.com
#  - opentastic@gmail.com
#
# Query Nova Placement API

RESULTS_DIR=`mktemp -d`

cleanup ()
{
    rm -rf $RESULTS_DIR
}

trap cleanup KILL EXIT

which python &>/dev/null && PY_VERSION="" || PY_VERSION="3"
[[ PY_VERSION==3 ]] && which python3 &>/dev/null || PY_VERSION=""

install_deps ()
{
    declare -a dependencies=(
        python${PY_VERSION}-simplejson
        jq
        curl
    )
    declare -a missing_dependencies=()
    for dep in ${dependencies[@]}; do
        dpkg -s $dep &>/dev/null || missing_dependencies+=( $dep )
    done
    ((${#missing_dependencies[@]})) || return 0
    local missing="${missing_dependencies[@]}"
    read -p "INFO: install required dependencies - $missing? [Yn] " answer
    [ "${answer,,}" = "y" ] || [ -z "$answer" ] || return 0
    sudo apt install ${missing_dependencies[@]} -y
}

json_key_exists ()
{
    key=$1; shift
    echo $@| python${PY_VERSION} -c "
import sys, json;
data=json.load(sys.stdin);
sys.exit(0) if '$key' in data else sys.exit(1);"
}

get_placement_endpoint ()
{
    svcs=`curl -s -H "X-Auth-Token: $TOKEN" "${AUTH_URL}/services"`
    if json_key_exists error $svcs; then
        svcs=`curl -s -H "X-Auth-Token: $TOKEN" "${AUTH_URL}/OS-KSADM/services"`
    fi

    n_svc=`echo $svcs| python${PY_VERSION} -c "
import sys, json;
ss = json.load(sys.stdin);
ss = ss.get('services') or ss['OS-KSADM:services'];
print([s['id'] for s in ss if s['name'] == 'placement'][0])"`

    curl -s -H "X-Auth-Token: $TOKEN" "${AUTH_URL}/endpoints"| \
        python${PY_VERSION} -c "
import sys, json;
ss = json.load(sys.stdin)['endpoints'];
print([s.get('url') or s.get('adminurl') \
    for s in ss \
        if s['service_id'] == '$n_svc' and \
            s.get('interface', 'admin') == 'admin'][0])"
}

TOKEN=`openstack token issue| grep ' id '| awk '{print $4}'`
AUTH_URL=`echo $OS_AUTH_URL| sed 's/5000/35357/g'`
placement_ep=`get_placement_endpoint`

curl -H "X-Auth-Token: $TOKEN" -H "OpenStack-API-Version: placement 1.1" $placement_ep/resource_providers > $RESULTS_DIR/resource_providers
for rp in `jq -r '.resource_providers[].uuid' $RESULTS_DIR/resource_providers`; do
    echo -e "\n================================================================="
    name=`jq -r ".resource_providers[]| select(.uuid==\"$rp\") | .name" $RESULTS_DIR/resource_providers`
    echo -e "Resource provider\n  - name: $name\n  - uuid: $rp"
    echo "Inventory:"
    curl -s -H "X-Auth-Token: $TOKEN" -H 'OpenStack-API-Version: placement 1.1' $placement_ep/resource_providers/$rp/inventories| jq
    echo "Allocations:"
    curl -s -H "X-Auth-Token: $TOKEN" -H 'OpenStack-API-Version: placement 1.1' $placement_ep/resource_providers/$rp/allocations| jq
done

echo -e "\nDone."